Barb from Butler Pa writes
I am afraid that the finish on the house siding will be effected by leaving the spray on too long.
The Bayer Advanced 2 in 1 Moss and Algae Killer RTS does not indicate the need to rinse after applying. It only states that if moss is dry to water the moss till wet to help the product adhere to the treatment area. We recommend contacting Bayer Advanced directly as we can only advise on what the label states. You may contact Bayer Advanced at 877-229-3724 for details.
Answer last updated on: 09/08/2014